50 results about "Cyanamide compound" patented technology

The invention discloses a method for preparing a non-metallic element doped carbon coated metal nanoparticle magnetic composite. The method comprises the steps that water-soluble metal divalent salt, a cyanamide compound and a nitrogen or boron or sulfur containing non-metallic compound are added into a methanol solution to be mixed, dissolved, dried and ground, and obtained homogeneous-phase powder is subjected to roasting pyrolysis under the protection of inert gas; and a pyrolysis product is subjected to acid pickling, washing, drying and grinding, and a target product is obtained. According to the whole preparing process of the method, metal ion reduction, metal nanoparticle coating and doping of nitrogen / boron / sulfur and other non-metallic elements are achieved in one step. The composite prepared through the method is high in degree of graphitization, good in dispersity between particles and high in purity, and the preparing method has the advantages that the cost is low, the process is simple, and large-quantity synthesis can be easily achieved.

The invention discloses a preparation method of a graphite phase carbon nitride / rutile monocrystal titanium dioxide (TiO2) nanowire array. The preparation method is characterized by comprising the following steps: (a) dissolving a cyanamide compound or urea in a solution, immersing the prepared rutile monocrystal TiO2 nanowire array into the obtained cyanamide compound or urea solution, and then taking out and drying the nanowire array; and (b) performing heat treatment on the dried nanowire array to finally obtain the graphite phase carbon nitride / rutile monocrystal TiO2 nanowire array. The preparation method has the advantages of simple process and low cost, thus being applicable to large-scale industrial production; and the prepared graphite phase carbon nitride / rutile monocrystal TiO2 nanowire array has good visible light response activity, and can be widely applied to the fields such as photocatalysis, hydrogen production by photocatalytic decomposition of water, photoelectric conversion and the like.

The invention belongs to the technical field of environmental materials and particularly relates to a photocatalytic material and a preparation method therefor. The preparation method comprises the steps of dispersing anatase-phase nano titanium dioxide into dichloromethane so as to obtain a white suspension, then, dropwise adding isocyanate into the suspension, and carrying out stirring reaction; and adding a cyanamide compound, carrying out stirring reaction, carrying out suction filtration at reduced pressure so as to obtain a titanium dioxide / cyanamide compound, and carrying out calcining and natural cooling, thereby obtaining a nitrogen-doped titanium dioxide / graphite-phase carbon nitride composite material. According to the photocatalytic material and the preparation method therefor, isocyanate serves as a bridging body to combine the cyanamide compound and nano titanium dioxide in the form of chemical bond, carbon nitride is subjected to in-situ growth on surfaces of titanium dioxide particles under high-temperature conditions, and heterojunctions with electron conduction capacity are formed between carbon nitride and titanium dioxide, so that the photocatalytic property of the composite material is improved.

The invention discloses a formaldehyde scavenging agent. The formaldehyde scavenging agent is prepared from, by weight percent, 5%-15% of a high-molecular polymer, 1%-5% of silicon dioxide, 1%-10% of ammonium chloride, 4%-12% of ammonium bisulfate, 1%-7% of urea, 3%-8% of a cyanamide compound, 1%-5% of 1-hydroxyethylidene-1,1-diphosphonic acid, 3%-6% of plant extract and the balance water. The formaldehyde scavenging agent can scavenge formaldehyde thoroughly and protect human health and is low in cost.

The invention discloses a paper or cloth which removes methanal and indoor organic volatile matter which features that it is base on paper or cloth material, absorb methanal removing agent on paper or cloth and dry the basal material to get product. The methanal removing agent consists following elements( by weight percent): amido compound 1- 50 percent, cyanamide compound 0.5-30 percent, hydroxyl group water dissolvable macro molecule compound 0.1-20 percent, nanometer titianum dioxide 0.8-1.5 percent, water 1-30 percent. The invention is of simple operation and effective volatile matter removing performance.

The invention belongs to the technical field of metal ceramic material preparation, and discloses a method for preparing composite Ti (C,N) metal ceramic powder through microwave carbon thermal reduction. Activated raw powder is obtained by conducting high-energy ball milling on cyanamide compounds, Ti source compounds, M source compounds and carbon source powders, and then the microwave in-situ carbon thermal reduction reaction is carried out to obtain the composite Ti (C,N) metal ceramic powder. According to the method, the cyanamide compounds are used as the raw material, a nitrogen sourceand a partial carbon source can be provided, meanwhile, the reaction temperature can be partially reduced, and the composition of the product powder obtained after nitridation reaction is more uniform; the raw materials are pre-treated by using high-energy ball milling, not only uniformly mixed nanocrystalline raw material powder can be obtained, but also the reaction driving force and diffusion ability of the raw materials can be improved, the reaction activity of elements is enhanced, and the subsequent synthesis temperature is reduced. Compared with a conventional carbon thermal reduction reaction, the method does not need N2 atmosphere requirements, the operation is simpler, and the product powder with the finer particle size is obtained more easily.

The invention belongs to the technical field of nano catalysts, and discloses a method for synthesizing a monatomic catalyst, the monatomic catalyst and an application. The method comprises the following steps: (1) under an acidic condition, polystyrene nanospheres are taken as a sacrificial template, and a cyanamide compound, furfural and a metal source fully react to obtain a high polymer, wherein the cyanamide compound is one or more of cyanamide, dicyandiamide or melamine, and the metal source is one or more of a Fe source, a Co source, a Ni source, a Pt source, an Au source and a Pd source; and (2) high-temperature pyrolysis is performed on the high polymer in the atmosphere of protective gas to obtain the monatomic catalyst. The method disclosed by the invention is simple, can be used for synthesizing various metal monatomic catalysts, is a universal method, can be used for synthesizing the monatomic catalyst on a large scale, and overcomes the defects of complex synthesis and difficulty in large-scale preparation of other existing technologies. The catalyst disclosed by the invention is excellent in performance, is used for electrocatalytic chemical reaction and is used as an electrocatalyst.

The invention discloses a Co-N-C catalyst. According to a preparation method of the Co-N-C catalyst, the Co-N-C catalyst is prepared at room temperature via grinding, or ball milling, or grinding-sintering of a cyanamide compound and a cobalt salt at a mass ratio of (1-20):1. The invention also discloses applications of the Co-N-C catalyst. In applications, the Co-N-C catalyst is mainly used for selective oxidation of the benzyl positions of aromatic hydrocarbons and the allyl position C-H bonds of olefins. The synthesis process of the Co-N-C catalyst is simple, is easy to control, and is safe; and at the same time, coordination of the cyanamide compound with the cobalt salt is firm, the cost of metal Co is relatively low, requirements on equipment used in catalyst synthesis are simple, the equipment is easily available; efficiency is high; no additive is added; no solvent is added; conditions of the Co-N-C catalyst in application process are mild; and cycling performance is excellent.

The invention provides a preparation method for a nano-composite of carbon-coated iron and iron carbide. The method comprises the following steps: (S1) mixing one type or more than one types among citric acid coordinated iron or EDTA coordinated iron with one type or more than one types among cyanoguanidine and melamine to form a first precursor; (S2) treating the first precursor with first high-temperature pyrolysis under an inert atmosphere or a reducing atmosphere to obtain a primary composite material; (S3) mixing the primary composite material with one type or more than one types among cyanoguanidine, melamine and hexamine to form a second precursor; and (S4) treating the second precursor with secondary high-temperature pyrolysis under the inert atmosphere or the reducing atmosphere,wherein the temperature of the first high-temperature pyrolysis is higher than the temperature of the secondary high-temperature pyrolysis. In the method provided by the invention, through coordination effects of common and cheap organic acids and assistant effects of cyanamide compounds, a use dosage of low-efficiency cyanamide compounds is effectively reduced, and generation of CNT coated metalby-products is avoided. Through two low-temperature pyrolysis courses, defects of the composite are effectively repaired.

A photoresist composition comprises about 0.5 to about 20 parts by weight of a photo-acid generator, about 10 to about 70 parts by weight of a novolac resin containing a hydroxyl group, about 1 to about 40 parts by weight of a cross-linker that comprises an alkoxymethylmelamine compound, and about 10 to about 150 parts by weight of a solvent.

The invention relates to an additive for an electro-deposited bright ferro-nickel alloy. The additive comprises a brightener and a complexing agent. The brightener comprises the following components: N-propargyl cyanamide, n-propargyl cyanamide salt, N-propargyl dicyandiamide, N-propargyl dicyandiamide salt, bis-N-propargyl dicyandiamide and bis-N-propargyl dicyandiamide salt; the complexing agent comprises the following components: amino acetic acid, amino acetate, aminopropionic acid, aminopropionate, diphosphonic acid and diphosphonate. By means of a synergistic effect of alkynyl and nitrile functional groups, the propargyl-containing cyanamide compound has very good brightening and leveling effects if being used in a ferronickel plating solution; the ferronickel plating coating can be prevented from flooding and fogging effectively by means of double complexing action of amino acids such as amino acetic acid and aminopropionic acid and diphosphonic acid and salt compositions thereof.

The invention discloses a formaldehyde remover which is characterized by comprising the following components (in percent by weight): 20-30 percent of amino compound, 10-35 percent of cyanamide compounds, 10-25 percent of hydroxyl-containing water-soluble high-molecular compound, 1-1.5 percent of titanium dioxide and 9-22 percent of water. The formaldehyde remover has the advantage that formaldehyde pollutants in air in a room and furniture in the room can be effectively removed.

The invention discloses a preparation method of a nitrogen-doped graphitized carbon nanocage and belongs to the field of novel carbon nanomaterials. The preparation method comprises steps as follows:cyanamide compounds are physically mixed with metal acetate or metal carbonate, and a mixture is obtained; the mixture is carbonized in the atmosphere of inert gas, and a carbonized product is obtained; the carbonized product is subjected to acid etching, and an etched product is obtained; the etched product is purified, and the nitrogen-doped graphitized carbon nanocage is obtained. According tothe preparation method provided by the embodiment of the invention, a template is not required to be prepared in advance, so that the production technology is simplified.

Provided are a supported metal material showing high catalytic activity, a supported metal catalyst, a method of producing ammonia and a method of producing hydrogen using the supported metal catalyst, and a method of producing a cyanamide compound. The supported metal material of the present invention is a supported metal material in which a transition metal is supported on a support, and the support is a cyanamide compound represented by the following general formula (1); MCN2 (1), wherein M represents a group II element of the periodic table, and the specific surface area of the cyanamide compound is 1 m2g−1 or more.

According to the monatomic copper / boron double-site multifunctional catalyst and the preparation method and application thereof, copper salt serves as a metal source, a cyanamide compound serves as a nitrogen source, organic acid serves as a dissolving agent of chitosan, soluble boron salt serves as a boron source, chitosan serves as a carbon source, silicon dioxide and frozen ice serve as double templates, a pyrolysis-etching-activation strategy is adopted, and the monatomic copper / boron double-site multifunctional catalyst is prepared. And the copper / boron double-site catalyst material with the hierarchical porous structure is successfully prepared. The catalyst has a hierarchical porous structure, provides abundant mass transfer channels for catalytic reaction, and further realizes efficient catalytic performance. In addition, the catalyst can also be used for reducing carbon dioxide to prepare synthesis gas. Compared with the prior art, the method for preparing the monatomic copper / boron double-site multifunctional catalyst material is simple, reliable, low in production cost, short in process, low in equipment requirement, easy to amplify experiments and capable of achieving industrial large-scale production.

The invention relates to a sewage purifying photolysis water hydrogen generation double-function environment-friendly carbon nitride photocatalyst and a preparation method and application thereof. Thecatalyst is prepared by taking a cyanamide compound or a nitrogen-enriched carbon-containing substance as a precursor and micro / nano inorganic salt as a template agent. The preparation method includes: physically mixing the precursor with the template agent different in proportion, and performing high-temperature calcining, template moving, washing and calcining to obtain a porous-structure catalyst. The catalyst is environment-friendly, low in cost, high in chemical and thermal stability and high in pollutant extruding efficiency.

A method of synthesizing a resin including mixing a first solution including a melamine compound with a second solution including glutaraldehyde to form a third solution, heating the third solution to 35° C. to 90° C. in at a pH above 7 for 5 to 70 minutes, and cooling the third solution to room temperature.

The present invention discloses a kind one binary melamine compound with the general expression as shown, relates to the preparation process of the compound, the retardant resin and paint, and their preparation process and application.

The invention discloses a macromolecule formaldehyde scavenging agent. The macromolecule formaldehyde scavenging agent comprises 5 to 5% of high-molecular polymer, 1 to 5% of silicon dioxide, 1 to 10%of ammonium chloride, 4 to 12% of ammonium hydrogen sulfate, 1 to 7% of urea, 3 to 8% of cyanamide compounds, 1 to 5% of etidronic acid, 3 to 6% of plant extract and the balance water. The high-molecular polymer comprises at least one kind of carbodiimide according to the following formula (I): R'-(N=C=N-R)n-R''(I), wherein R represents an aromatic or aliphatic or alicyclic or aryl group alkylenegroup. According to the group, an aliphatic series or cycloaliphatic substituent group carrying three C atoms are carried on two ortho-positions or optional para-positions of an aromatic carbon atomcarrying a carbodiimide group under the condition of aromatic or aryl group alkylene residue; dissociated out formaldehyde in a material can be captured, the agent can permeate into the material to thoroughly remove non-releasing formaldehyde, the aim of permanently cleaning formaldehyde is achieved, and human body health is protected.

The invention belongs to the technical field of soil conditioning, and particularly relates to a composite soil conditioner and application thereof. The composite soil conditioner comprises the following components in parts by mass: 15-45 parts of peroxide, 15-30 parts of a magnesium cyanamide compound and 25-70 parts of a dispersing aid. According to the invention, a novel Fenton-like system withperoxide as an oxidizing agent and a magnesium cyanamide compound as a catalyst is used, iron mud cannot be generated in the process of degrading organic pollutants, no toxic metal component is introduced, and magnesium oxide in a magnesium cyanamide composite material has very high adsorption performance, can adsorb heavy metal and stabilize heavy metal ions and has relatively good effect on stabilization of heavy metal ions in soil; and through the synergistic effect of various components, free heavy metals can be effectively adsorbed while a fertilizer is provided, and the stabilization and the degradation of organic pollutants difficult to biodegrade can be achieved.

The invention relates to a flameproofed resilient block polymer comprising polymerized units of at least one vinylaromatic monomer and at least one diene monomer with at least one flameproofing agent B) which comprises a compound comprising phosphorus, in particular a phosphorus-containing melamine compound, a process for the preparation and the use for the production of moldings.

The invention relates to a formaldehyde removal plate, including a filter plate, the filter plate is provided with a plurality of fine through holes, the surface of the filter plate and the fine through holes is coated with a formaldehyde adsorption layer, and the formaldehyde adsorption layer contains a hydroxyl-containing water-soluble Permanent polymer compounds, amino compounds, cyanamide compounds and nano-sized titanium dioxide. The filter plate is a plate-shaped structure, and the filter plate is provided with many small through holes, which can increase the contact area with the air. The filter plate is coated with a coating, which can absorb formaldehyde in the air when it is in contact with the air, and increase the formaldehyde removal effect.

The invention provides a carbon nitride quantum dot preparation method, wherein the carbon nitride quantum dot is carbon nitride quantum dot. The preparation method comprises: providing a cyanamide compound and a phenyl modifier, adding a first solvent, mixing, carrying out stirring treatment at a temperature of 50-90 DEG C, and carrying out a constant temperature reaction to obtain a milky liquid; carrying out first centrifugal separation on the milky liquid to obtain precursor powder; placing the precursor powder in a reaction container, heating to a temperature of 350-600 DEG C by introducing an inert gas flow, and carrying out constant temperature treatment for 1-3 h to obtain carbon nitride powder; and adding a second solvent to the carbon nitride powder, ultrasonically stripping, carrying out second centrifugal separation, and drying the obtained supernatant to obtain the carbon nitride quantum dots.

The invention relates to a formaldehyde remover. The formaldehyde remover comprises a shell, one end of the shell is provided with an air inlet, an exhaust fan is arranged at the other end of the shell, and a coating filter plate, a metal filter plate and ultraviolet lamps are arranged in the shell. Each of the coating filter plate and the metal filter plate is provided with a plurality of fine through holes, and the surface of the coating filter plate and the fine through holes thereof is coated with a formaldehyde adsorption layer which comprises hydroxyl water-soluble polymer compounds, amino compounds, cyanamide compounds and nanoscale titanium dioxide. The surface of the metal filter plate and the fine through holes thereof is provided with a nano-scale titanium dioxide layer, and the ultraviolet lamps are arranged on the lateral side of the metal filter plate. Indoor air is sucked by the exhaust fan and flows through the coating filter plate and the metal filter plate to eliminate formaldehyde by means of coating adsorption and ultraviolet decomposition.

The invention relates to an anion formaldehyde scavenging machine. The anion formaldehyde scavenging machine comprises a shell, an air inlet is formed in one end of the shell, an exhaust fan is arranged at the other end of the shell, and the shell is internally provided with a coating filter plate, a metal filter plate, an ultraviolet lamp and an anion generation plate; the coating filter plate, the metal filter plate and the anion generation plate are each provided with multiple fine through holes, the surface of the coating filter plate and the surfaces of the fine through holes of the filter plate are coated with a formaldehyde adsorption layer, and the formaldehyde adsorption layer comprises a water-soluble high molecular compound containing a hydroxyl group, a compound containing amino, a cyanamide compound and nano titanium dioxide; the surface of the metal filter plate and the surfaces of the fine through holes of the metal filter plate are provided with a nano titanium dioxide layer, and the ultraviolet lamp is arranged on the side face of the metal filter plate; the anion generation plate and the fine through holes thereof are provided with a nano tourmaline particle coating. Indoor air is sucked by means of the exhaust fan, when the air flows through the coating filter plate and the metal filter plate, formaldehyde is scavenged through two ways of coating adsorption and ultraviolet radiation decomposition, and the anion generation plate can produce anions to make the indoor air fresh.

The invention discloses a nitrogen-doped phosphorene quantum dot and a preparation method thereof. The preparation method comprises the steps that red phosphorus, a cyanamide compound and a catalyst are mixed and heated, and a nitrogen-doped black phosphorus material is generated through a reaction; the nitrogen-doped black phosphorus material is ground into powder, a dispersion medium and sulfonate containing trivalent rare earth elements are added, and ultrasonic treatment is carried out to obtain an ultrasonic dispersion liquid; the ultrasonic dispersion liquid is centrifuged, and the nitrogen-doped phosphorene quantum dots are prepared. According to the nitrogen-doped phosphorene quantum dot, the nitride with the layered structure is doped in the black phosphorus material, so that the prepared nitrogen-doped phosphorene quantum dot has relatively high polarity, nitrogen atoms in the nitrogen-doped phosphorene quantum dot can generate hydrogen bond interaction with hydrogen atoms in water, and the nitrogen-doped quantum dot has relatively high water solubility compared with the phosphorene quantum dot; therefore, agglomeration of the nitrogen-doped phosphorene quantum dots in a water solvent can be effectively avoided, and the nitrogen-doped phosphorene quantum dots are easy to disperse after being dried.